Driving-chain of the silent type.



C. G. EDEN.

DRIVING CHAIN 0F THE SILENT TYPE.

APPLICATION FILED JUNEZO. [914.

hmmm?. Patented Apr. 25,1916.

2 SHEETS-SHEET I.

THB COLUMBIA PMNcuRAPli 0., WASHINGTON. D. C.

C. G. EDEN.

DRIVING CHAIN OF THE SILENT TYPE.

APPLICATION man 1uNE2o. 1914.

Patented Apr. 25, 1916.

2 SHEETS-SHEET 2.

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CHRISTOPHER GABRIEL EDEN, OF MANCHESTER, ENGLAND, .ASSG-NGR T0 HANS EENOLCD LTlVITTED, 0F MANCHESTER, ENGLAND.

DRIVING-CHAIN OF THE SILENT TYPE.

Specification of Letters .Patent Patented Apr.. 25, T9916..

Application led .Tune 20, 1914. Serial No. 846,282.

To all whom t may concern:

Be it known that T, CHRISTOPHER GABRIEL EDEN, a subject of the King of Great Britain, land resident of Progress lrVorks,

Brook street, Manchester, England, have invented certain new and useful Tmprovements in Driving-Chains of the Silent Type, of which the following is a specification.

This invention relates to chains of the type usually called silent chains, made from stamped, or pressed links or coined links, that is to say, links shaped from blanks by dies in an analogous manner to that in which coins are made, wherein the gearing faces of the teeth are formed by bending the ends of the links at right angles to the webs, and the links are connected together by bushes and studs.

It is the principal object of the invention to provide a chain of simple construction with links of high tensile strength, and bearings for the studs of the full available width across the chain.

Another object is to provide a chain which, while fullling these requirements, will gear on both. faces if needed.

Further objects are to provide a cheap construction in which heat treatment of the body of the link is obviated, while the chain is kept light, thus minimizing wear and noise.

The invention is illustrated in the accompanying drawings in several examples of construction.

Tn the drawings Figure l is a plan view, partly in section, of a chain with rectangular inner combinations, suitable for gearing on both faces with circumferentially grooved chain wheels; Fig. 2 is a side elevation, and Fig. 3 is an end elevation of the same chain. Fig. a is a plan view, partly in section, of a chain with -shaped inner combinations, suitable for gearing on both faces with circumferentially grooved chain wheels; Fig. 5 is a side elevation, and Fig. 6 is an end elevation of the same chain.

l Figs. 7, 9 and l1 are plan views of one joint of modified constructions of chains with rectangular inner combinations. Figs. 8, 10 and 12 are plan views of one joint of modified constructions of chains with T- shaped inner combinations. Fig. 13 is a side elevation of a half-I link for a chain suitable for gearing on both faces with circumferentially grooved chain wheels. Fig. lelis a side elevationof a half-I link for a .chain suitable for gearing on one face only with circumferentially grooved chain wheels. Fig. l5 is a side elevation of a half-T link `for a chain suitable for gearing on one face projections P P pointing toward one another, as in Fig. l, or away from one another as in Fig. 4.-. The bushes extend outward beyond the link side-faces on both sides of the inner combination, as shown at B B. These elements are connected to form a chain by outer combinations consisting of ,half-I links C C, placed one on each side of the inner combinations with their endprojections Q Q pointing inward as shown, and by the studs D D, which may be riveted i to the connecting links as shown at B. It is .of great importance that the studs l) D should be firmly held where they are riveted. Either the edges of the end-projections .Q Q .are suitably formed to work against the side-faces of the adjacent links as shown at W, Fig. l, or the edges of the bushes B B 4are so formed as shown at V, or both the edges of the end-projections Q Q and of the bushes B B are so formed, wherever relative motion of the edges and the sidefaces can take place.

Tt will be seen that practically the full width of the chain is available for providing bearing surface for the studs. The gearing faces are formed on the end-projections of the links as shown at G.

In some chains it may be convenient or desirable to have the bushes in contact with the end-projections P P and Q Q as shown in Figs. 7 and S; the bushes and the endprojections P P of the inner combinations will then mutually support one another, and the surfacesof the endprojections Q Q of the outer combinations can be suitably treated to render them lit to work against the outside of the bushes.v This construction has the advantage also of making the chain more rigid to resist lateral whipping. Other modified constructions having the same 'advantages are shown in Figs. 9, 10, 11 and 12. In the chains shown in Figs. 9 and 10 the end-projections of the links of the inner combinations are bent at right angles to the gearing faces, as shown at X, and their edges are in contact with the bush at each end of the inner combination; whereas in the chains shown in Figs. 11 and 12 the end-projections of the links of the outer combinations, as shown at Y, as well as the end-projections of those of the inner combinations, as shown at X, are bent at right angles to the gearing faces, and their edges are in contact with the bush at each end of the inner combinations.

The links used in any of these constructions may have webs of the full depth of the chain as shown in Fig. 8, or of lessthan the full depth as shown in Fig. 7 and in the latter case the circumferential grooves on the chain wheels need extend only part of the way down the radial depth of the teeth. Again, the webs may be formed with av space to clearv the tooth intermediate between those engaged with or adjacent vto the gearing faces of the link, as shown in Fig. l5, so that a simple chain wheel may be used without circumferential `grooves at all. Further, the links may have gearing faces on both sides as shown in Fig. 13, or on one side only as shown in Figs. 14C and 15.

Chains made in accordance with this invention are light and durable, cheap to manufacture, and easy to assemble, to take apart and to join up; and they are readily made suitable to gear on one face only, or

on both faces, with simple or circumferentially grooved chain wheels.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is z- 1. The combination in a chain of a pair of inner 'links of half-I section with corresponding openings therein near to one end kof each, a cylindrical bush fitting in the corresponding openings of said links, and projecting outwardly beyond the link webs,

said links being formed with laterally projecting ends constituting gearing faces, a

pairof outer links also formed with later- Vally projecting ends constituting gearing faces, the links of said outer pair being f situated with their ends'one at either side 'of the inner links at one end thereof, and a "stud Asecured to said outer links, and connecting them together, and passing through the cylindrical bush of the inner pair of links.

2. The combination in a chain of a pair of inner links of half-I section formed with flaterally projecting ends constituting vgearing faces, said projecting ends being directed toward one another and contacting Vat their inner faces, said links having also openings near the ends thereof, a'cylindrical bush passing through and fitting in the corresponding openings at one end of each link, and projecting beyond the link-webs, a pair of outer links formed with laterally projecting ends constituting gearing faces, said links being situated with their ends one at either side of the inner links and with their projections inwardly directed, and a stud secured to said outer links, and connecting them together, and passing through the cylindrical bush of the inner pair of links.

3. The combination in a chain of a pair of inner links of half-I section formed with openings therein near their ends, a cylindrical bush fitting in corresponding open ings of said links and projecting beyond the same outside the link webs, said links having laterally projecting ends bent over at their inner ends to abut against the bush, said laterally projecting ends also constituting the gearing faces for the links, a 4pair of outer links formed with laterally projecting ends constituting gearing faces, said links being situated with their ends one at either side of the inner links and with their projections inwardly directed,

and a stud secured to said outer links, and

connecting them together, and passing through the cylindrical bush of the inner pair of links.

4. The combination in a chain of a pair of inner links of half-I section formed with openings therein near their ends, a cylindrical bush fitting in corresponding openings ofsaid links and projecting beyond the same outside the link Webs, said links having laterally projecting ends bent over at their inner ends to abut against the bush, said laterally projecting ends also constituting the gearing faces for the links, a pair of outer links formed with laterally projecting ends constituting gearing faces, said links being situated with their ends one at either side of the inner links and with their projections inwardly directed, said projections being also bent over to bear against ythe bush, and a stud secured to said outer 'tuting the gearing faces for the links, a

pair of outer links formed with laterally projecting ends constituting gearing faces, said links being situated with their ends one at either side of the inner links and my neme this 2nd day of April, 1914, in the with their projections inwardly directed, presence of two subscribing Witnesses. and a stud secured to said outer links, end CHRISTOPHER GABRIEL EDEN. connectlng them together, and passing through the cylindrical bush of the inner Vitnesses:

pair of links. ARTHUR ASHCROFT,

In witness whereof, I have hereunto signed CHARLES ERNEST MAYCOCK.

Uopiee ol.' thin patent may be obtained for five cents each, by addressing the Commissioner of Patents, Woohinton, JD. C. 

